Which item is a max takeoff engine parameter?

Which item is a max takeoff engine parameter?

• A. AEO 5 min
• B. 106% N2
• C. 950 ITT
• D. 20 sec

Answer: (A)

Takeoff engine parameters are limits that apply specifically to the takeoff phase and are often labeled by the engine operating condition, such as All Engines Operative (AEO). AEO 5 min communicates a time-bound restriction: with all engines operating, you may apply takeoff thrust for up to 5 minutes. This is a true max takeoff parameter because it sets a duration limit tied to the takeoff configuration. The other options describe instantaneous thresholds rather than a duration limit: 106% N2 is a maximum turbine speed, 950 ITT is a maximum inter-turbine temperature, and 20 seconds is a time value not tied to the takeoff thrust duration under AEO. Thus, the AEO 5 min entry is the one that represents a max takeoff parameter.

Takeoff engine parameters are limits that apply specifically to the takeoff phase and are often labeled by the engine operating condition, such as All Engines Operative (AEO). AEO 5 min communicates a time-bound restriction: with all engines operating, you may apply takeoff thrust for up to 5 minutes. This is a true max takeoff parameter because it sets a duration limit tied to the takeoff configuration.

The other options describe instantaneous thresholds rather than a duration limit: 106% N2 is a maximum turbine speed, 950 ITT is a maximum inter-turbine temperature, and 20 seconds is a time value not tied to the takeoff thrust duration under AEO. Thus, the AEO 5 min entry is the one that represents a max takeoff parameter.